Shield tail brush stress sensor

Abstract

The utility model provides a shield tail brush stress sensor, which comprises a first fastening piece for fixing a shield tail brush on a shield tail, and the first fastening piece sequentially penetrates through a fixing piece and a shield tail brush bottom plate to fix the shield tail brush on the shield tail; and the first fastener is provided with a mechanical sensing element for detecting the stress of the shield tail brush bottom plate. The fixing piece and the shield tail brush bottom plate are fixed to the shield tail through the first fastening piece, the stress detection element is arranged on the first fastening piece, and the pressure provided by the shield tail brush bottom plate in a shield tail grease cavity can be collected; through comparison and analysis of the pressure values, the abrasion condition of the shield tail brush can be obtained through changes of the pressure values, the situation that the shield tail sealing performance is reduced due to abrasion is avoided, assembly installation is convenient, and cost is low.

Description

Technical Field

[0001] The utility model relates to the field of shield machines, in particular to a shield tail brush of a shield machine. Background Art

[0002] As cross-river and sea tunnels gradually become a trend, shield work presents the characteristics of "large diameter, high water pressure, and long distance", which puts a great test on the safety of shield machines in tunnel engineering. The characteristics of high water pressure and long distance put forward higher requirements on the sealing performance of the shield tail of the shield machine, and the wear degree of the shield tail brush and whether it has resilience may affect the sealing performance of the shield tail. Among them, the stress condition of the shield tail brush is the main factor affecting the wear of the shield tail brush. Summary of the invention

[0003] Purpose of the invention: The purpose of the utility model is to provide a shield tail brush force sensor that is convenient for collecting the force on the bottom plate of the shield tail brush in view of the deficiencies in the prior art.

[0004] Technical solution: The shield tail brush force sensor of the utility model comprises a first fastener for fixing the shield tail brush on the shield tail, wherein the first fastener passes through the fixing member and the shield tail brush bottom plate in sequence to fix it on the shield tail;

[0005] The first fastener is provided with a mechanical sensing element for detecting the force applied to the shield tail brush bottom plate.

[0006] Furthermore, the outlet wire of the mechanical sensing element is arranged at the head of the first fastener.

[0007] Furthermore, the outgoing wire of the mechanical sensing element enters the wiring hole that passes through the shield tail and is led to the front end of the shield tail.

[0008] Furthermore, the fixing member is provided with a countersunk hole for installing the first fastener.

[0009] Furthermore, the countersunk hole is sealed by filling with glue.

[0010] Further, the first fastener is provided with a smooth portion and a threaded portion;

[0011] The smooth portion is configured at a circumferential position corresponding to the first fastener and the fixing member;

[0012] The threaded portion is constructed at the circumferential position corresponding to the first fastener and the shield tail brush bottom plate and the shield tail;

[0013] Furthermore, the mechanical sensing element is arranged at the axis of the smooth portion of the first fastener.

[0014] Furthermore, a guide piece is fixed on the shield tail, and a penetrating guide hole is constructed in the guide piece, and the guide hole leads the outgoing line of the mechanical sensing element to the direction of the shield tail.

[0015] Furthermore, the guide hole is connected to a protective sleeve for the outlet wire of the mechanical sensing element to pass through, and the protective sleeve is arranged on the shield tail.

[0016] Furthermore, the guide hole is sealed with glue.

[0017] Beneficial effects: The utility model fixes the fixing piece and the shield tail brush base plate on the shield tail through the first fastener. The first fastener is provided with a mechanical sensing element, which can collect the force data of the shield tail brush base plate. By comparing and analyzing the pressure values, the wear condition of the shield tail brush can be obtained through the change of the pressure value, thereby avoiding the reduction of the shield tail sealing performance caused by wear. The components are easy to install and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the shield tail brush force sensor installed on the shield tail of the utility model;

[0019] Figure 2 This is the top view of the installation of the shield tail brush force sensor;

[0020] Figure 3 This is a schematic diagram of the structure of the shield tail brush force sensor. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is described in detail below with reference to the accompanying drawings, but the protection scope of the utility model is not limited to the embodiments.

[0022] A shield tail brush 2 is installed along the length direction of the shield tail 4. Generally, at least three shield tail brushes 2 are installed on the shield tail 4. The brush body of the shield tail brush 2 contacts the concrete pipe segment 1, and a shield tail grease cavity is formed between all the shield tail brushes 2 and the shield tail 4 and the pipe segment 1. If the shield tail brush 2 is worn, it will affect the sealing performance of the shield tail brush 2 and cause grease leakage. Based on this, the present application proposes a shield tail brush force sensor, such as Figure 1 As shown, the shield tail brush 2 is fixed to the shield tail 4 by a first fastener 5, which passes through the fixing member 11 and the bottom plate of the shield tail brush 2 in sequence, and fixes the fixing member 11 and the shield tail brush 2 to the shield tail 4. The first fastener 5 is provided with a mechanical sensing element for detecting the force on the bottom plate of the shield tail brush 2. Whether the shield tail brush 2 is worn is determined according to the change of the force on the bottom plate 2.

[0023] It is conceivable that the present application integrates a mechanical sensing element on the first fastener 5. As one implementation, the first fastener 5 can be an external hexagonal bolt, such as Figure 3As shown, during actual installation, a special sleeve is required for installation and tightening. For easy installation, the fixing member 11 may be provided with a through hole for installing the first fastener 5 and the bottom plate may be provided with a screw hole for installing the first fastener 5. The through holes are evenly distributed on the fixing member 11 to ensure uniform force, more accurate pressure value collected by the mechanical sensing element, and more precise judgment of the degree of wear.

[0024] The first fastener 5 is provided with a smooth portion and a threaded portion. The smooth portion is constructed at the circumferential portion of the first fastener 5 corresponding to the fixing member 11, and the threaded portion is constructed at the circumferential portion of the first fastener 5 corresponding to the bottom plate and the shield tail of the shield tail brush 2. Figure 3 As shown, the circumferential lower portion 8 of the first fastener 5 is a threaded portion, and the upper portion 14 is not threaded, so there is a certain distance 15 between the upper portion and the fixing member 11, the bottom plate of the shield tail brush 2, and the shield tail 4. The mechanical sensing element is arranged in the axial direction of the smooth part (not shown in the figure), which can be used to detect the pressure provided by the bottom plate of the shield tail brush 2 to the fixing member 11. The mechanical sensing element is arranged here to reduce the strength impact caused by the modification of the first fastener 5.

[0025] The outgoing line source 7 of the mechanical sensing element is arranged at the head of the first fastener 5 , so the outgoing line source 7 can be directly led out, then enter the wiring hole 12 penetrating the shield tail 4 , and be led to the direction of the shield tail 4 .

[0026] Since the outgoing line source 7 is located at the head of the first fastener 5, in order to protect the outgoing line source 7, a countersunk hole 13 for installing the first fastener 5 is constructed on the fixing member 11. After the first fastener 5 is installed, the countersunk hole 13 is sealed with glue to improve the sealing performance of the shield tail 4.

[0027] like Figure 1 , 2 As shown, a guide member 9 is fixed on the shield tail 4, and the fixing method can be welding without limitation. A through guide hole 3 is constructed in the guide member 9, and the guide hole 3 leads the outgoing line 6 of the mechanical sensing element to the front end direction of the shield tail 4. Generally speaking, the direction of the guide hole 3 can be any direction as long as it can guide the outgoing line 6 of the head of the first fastener 5 to the head of the shield tail 4. Usually, for the sake of simple wiring, the shortest straight line distance is the best direction of the outgoing line 6. Therefore, the extension direction of the guide hole 3 can be along the length direction of the shield tail 4. The structural form of the guide hole 3 can also be changed, and it can be a through hole that penetrates the guide member 9, or it can be a groove opened on the surface of the guide member 9. The main purpose is to guide the direction of the outgoing line 6. However, it should be noted that no matter which setting form is used, it needs to be sealed by glue filling.

[0028] The guide hole 3 is connected with a protective sleeve 10 for the outlet wire 6 of the mechanical sensing element to pass through, and the protective sleeve 10 is arranged on the shield tail 4, so that the outlet wire 6 is led out from the guide hole 3 and enters the protective sleeve 10, and can be led out from the front end of the shield tail 4 along the protective sleeve 10. The protective sleeve 10 can be a rigid steel pipe or a flexible hose with a certain degree of flexibility, which is not limited here.

[0029] The outlet wires 6 of the first sensors of the plurality of shield tail brushes 2 installed at the rear of the shield tail 4 can be directly led out from the fixing member 11 and then enter the wiring hole 12 that runs through the shield tail 4. It can be imagined that the outlet wires 6 of the rear shield tail brushes 2 can extend from the wiring hole 12 inside the shield tail 4 to the front end of the shield tail 4. The wiring hole 12 also needs to be sealed with glue.

[0030] The way of leading out the outgoing wire 6 from the head of the shield tail 4 can be to directly reach the head through the wiring hole 12, or to enter the protective sleeve 10 and merge with the outgoing wires 6 of other shield tail brushes 2 and lead out. In this case, a connection port can be opened on the surface of the shield tail 4, where the wiring hole 12 bypasses all the shield tail brushes 2, and the protective sleeve 10 is adapted to open a docking port at the corresponding position. Therefore, the outgoing wire 6 of the rear shield tail brush 2 passes through the wiring hole 12 and the protective sleeve 10, and is led out from the head of the shield tail 4.

[0031] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the present invention defined in the appended claims.

Claims

1. A shield tail brush force sensor, characterized in that: It includes a first fastener for fixing the shield tail brush on the shield tail, wherein the first fastener passes through the fixing piece and the shield tail brush bottom plate in sequence to fix it on the shield tail; The first fastener is provided with a mechanical sensing element for detecting the force applied to the shield tail brush bottom plate.

2. The shield tail brush force sensor according to claim 1, characterized in that: The outlet wire of the mechanical sensing element is arranged at the head of the first fastener.

3. The shield tail brush force sensor according to claim 1, characterized in that: The outgoing wire of the mechanical sensing element enters the wiring hole penetrating the shield tail and is led to the front end of the shield tail.

4. The shield tail brush force sensor according to claim 1, characterized in that: The fixing member is provided with a countersunk hole for installing the first fastener.

5. The shield tail brush force sensor according to claim 4, characterized in that: The countersunk hole is sealed by filling with glue.

6. The shield tail brush force sensor according to claim 1, characterized in that: The first fastener is provided with a smooth portion and a threaded portion; The smooth portion is configured at a circumferential position corresponding to the first fastener and the fixing member; The threaded portion is constructed at a circumferential position corresponding to the first fastener, the shield tail brush bottom plate, and the shield tail.

7. The shield tail brush force sensor according to claim 6, characterized in that: The mechanical sensing element is arranged at the axis center of the smooth portion of the first fastener.

8. The shield tail brush force sensor according to claim 2, characterized in that: A guide piece is fixed on the shield tail, and a penetrating guide hole is constructed in the guide piece. The guide hole leads the outgoing line of the mechanical sensing element to the direction of the shield tail.

9. The shield tail brush force sensor according to claim 8, characterized in that: The guide hole is connected with a protective sleeve for the outlet wire of the mechanical sensing element to pass through, and the protective sleeve is arranged on the shield tail.

10. The shield tail brush force sensor according to claim 8, characterized in that: The guide hole is filled with glue for sealing.

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